LEED for existing Buildings
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LEED for existing Buildings


DisciplinaGestão Ambiental na Indústria27 materiais116 seguidores
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LEED for Existing Buildings: Operations & Maintenance, September 2008
34
OPTION A
OPTION B and C
Potential Technologies & Strategies
Existing building commissioning and energy audits will help identify areas of building operations that are 
not efficient. Implement energy-efficient retrofits and energy-saving techniques to reduce the building\u2019s energy 
use.
Choose energy-efficient office equipment, maintenance equipment, and appliances to help reduce energy waste. 
Use meters on major mechanical systems to monitor energy consumption.
In addition to efficiency improvements, consider renewable energy options as a way to minimize the building\u2019s 
environmental impact.
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LEED for Existing Buildings: Operations & Maintenance, September 2008
35
EA Credit 2.1: Existing Building Commissioning: Investigation and Analysis
2 points 
Intent
Through a systematic process, to develop an understanding of the operation of the building\u2019s major energy-using 
systems, options for optimizing energy performance and a plan to achieve energy savings.
Requirements
Conduct one of the following:
OPTION A: Commissioning Process
Develop a retrocommissioning, recommissioning or ongoing commissioning plan for the building\u2019s major 
energy-using systems.
Conduct the investigation and analysis phase.
Document the breakdown of energy use in the building.
List the operating problems that affect occupants\u2019 comfort and energy use, and develop potential operational 
changes that will solve them.
List the identified capital improvements that will provide cost-effective energy savings and document the 
cost- benefit analysis associated with each.
OPTION B: ASHRAE Level II, Energy Audit
Conduct an energy audit that meets the requirements of ASHRAE Level II, energy survey and analysis.
Document the breakdown of energy use in the building.
Perform a savings and cost analysis of all practical measures that meet the owner\u2019s constraints and economic 
criteria, along with a discussion of any effect on operations and maintenance procedures.
List the identified capital improvements that will provide cost-effective energy savings and document the 
cost- benefit analysis associated with each.
Potential Technologies & Strategies
Based on the building operating plan and systems narrative, confirm that all building systems and equipment 
are functioning as appropriate according to the equipment schedule. Conduct testing and analysis to ensure 
that building systems and equipment are functioning correctly. Identify opportunities to make no- or low-cost 
capital improvements to enhance building performance.
LEED for Existing Buildings: Operations & Maintenance, September 2008
36
EA Credit 2.2: Existing Building Commissioning: Implementation
2 points 
Intent
To implement minor improvements and identify planned capital projects to ensure that the building\u2019s major 
energy-using systems are repaired, operated, and maintained effectively to optimize energy performance.
Requirements
Implement no- or low-cost operational improvements and create a capital plan for major retrofits or upgrades.
Provide training for management staff that builds awareness and skills in a broad range of sustainable building 
operations topics; this could include energy efficiency and building, equipment and systems operations, and 
maintenance.
Demonstrate the observed and/or anticipated financial costs and benefits of measures that have been 
implemented.
Update the building operating plan as necessary to reflect any changes in the occupancy schedule, equipment 
run-time schedule, design setpoints, and lighting levels.
Potential Technologies & Strategies
Implement no- and low-cost operational improvements that will immediately enhance building performance. 
Develop a capital plan for the completion of any major retrofits identified through the investigation and analysis 
phase.
LEED for Existing Buildings: Operations & Maintenance, September 2008
37
EA Credit 2.3: Existing Building Commissioning: Ongoing Commissioning
2 points
Intent
To use commissioning to address changes in facility occupancy, usage, maintenance, and repair. Make periodic 
adjustments and reviews of building operating systems and procedures essential for optimal energy efficiency 
and service provision.
Requirements
Implement an ongoing commissioning program that includes elements of planning, system testing, performance 
verification, corrective action response, ongoing measurement, and documentation to proactively address 
operating problems.
Create a written plan that summarizes the overall commissioning cycle for the building by equipment or 
building system group. The ongoing commissioning cycle must not exceed 24 months. This plan must include 
a building equipment list, performance measurement frequency for each equipment item, and steps to respond 
to deviation from expected performance parameters.
Complete at least half of the scope of work in the first commissioning cycle (as indicated by the percentage of 
the plan\u2019s total budget) prior to the date of application for LEED for Existing Buildings: O&M certification. 
Only work completed within two years prior to application may be included to show progress in the ongoing 
commissioning cycle.
Update the building operating plan and/or systems narrative as necessary to reflect any changes in the occupancy 
schedule, equipment run-time schedule, design setpoints, lighting levels, or system specifications.
Potential Technologies & Strategies
Develop an ongoing commissioning program that addresses the ongoing changes and maintenance needs in an 
existing building.
LEED for Existing Buildings: Operations & Maintenance, September 2008
38
EA Credit 3.1: Performance Measurement: Building Automation System
1 point
Intent
To provide information to support the ongoing accountability and optimization of building energy performance 
and identify opportunities for additional energy-saving investments.
Requirements
Have in place a computer-based building automation system (BAS) that monitors and controls key building 
systems, including, but not limited to, heating, cooling, ventilation, and lighting. Have a preventive maintenance 
program in place that ensures BAS components are tested and repaired or replaced according to the manufacturer\u2019s 
recommended interval. Demonstrate that the BAS is being used to inform decisions regarding changes in 
building operations and energy-saving investments.
Potential Technologies & Strategies
Install and/or maintain a BAS to automatically control key building systems. Ensure that relevant staff are 
adequately trained to use the system, analyze output, make necessary adjustments, and identify investment 
opportunities to improve energy performance.
LEED for Existing Buildings: Operations & Maintenance, September 2008
39
EA Credits 3.2 and 3.3: Performance Measurement: System-Level Metering
1\u20132 points 
Intent
To provide accurate energy use information to support energy management and identify opportunities for 
additional energy-saving improvements.
Requirements
Develop a breakdown of energy use in the building, either through EA Credits 2.1 and 2.2 or by using energy 
bills, spot metering or other metering